PDF Signer 3.0 Server-Side Template Injection RCE via CSRF Cookie
CVE-2019-25729

9.3CRITICAL

Key Information:

Vendor

Simcy Creative

Status
PDF Signer
Vendor
CVE Published:
4 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2019-25729?

PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting PHP commands through the CSRF-TOKEN cookie parameter. Attackers can craft malicious cookie values containing template injection payloads like shell_exec() to execute system commands and retrieve sensitive information from the server.

Affected Version(s)

PDF Signer 3.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2019-25729 - Proof of Concept

References

https://www.exploit-db.com/exploits/46276
exploit
https://codecanyon.net/user/simcy_creative
product
https://codecanyon.net/item/signer-create-digital-signatu...
product

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

dd_ (info@malicious.group)
.